{"schemaVersion":3,"id":"CVE-2004-0189","aliases":["RHSA-2004:133","DEBIAN-CVE-2004-0189","DSA-474"],"status":"published","duplicateOf":null,"title":null,"description":"The \"%xx\" URL decoding function in Squid 2.5STABLE4 and earlier allows remote attackers to bypass url_regex ACLs via a URL with a NULL (\"%00\") character, which causes Squid to use only a portion of the requested URL when comparing it against the access control lists.","dates":{"published":"2004-09-01T04:00:00.000Z","modified":"2024-08-08T00:10:03.868Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":7.5,"severity":"high","version":"2.0","versionLabel":"v2.0","source":"NVD","vector":"AV:N/AC:L/Au:N/C:P/I:P/A:P","computed":false,"selection":"backend-summary"},"metrics":[{"version":"2.0","versionLabel":"v2.0","source":"NVD","score":7.5,"severity":"high","vector":"AV:N/AC:L/Au:N/C:P/I:P/A:P","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.13807,"percentile":0.96492,"severity":"medium","asOf":"2026-10-20T00:00:00.000Z","change":{"pp":0,"baselineDate":"2026-09-20T00:00:00.000Z","baselineScore":0.13807},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.13807,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.13807,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.13807,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.13807,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.13807,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.13807,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.13807,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.13807,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.13807,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.13807,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.13807,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.13807,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.13807,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.13807,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.13807,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.13807,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.13807,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.13807,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.13807,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.13807,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.13807,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.13807,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.13807,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.13807,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.13807,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.13807,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.13807,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.13807,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.13807,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.13807,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.13807,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.13807,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.13807,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.13807,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.13807,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.13807,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.13807,"percentile":0.96492}],"last30":[{"date":"2026-09-20T00:00:00.000Z","score":0.13807,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.13807,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.13807,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.13807,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.13807,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.13807,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.13807,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.13807,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.13807,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.13807,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.13807,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.13807,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.13807,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.13807,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.13807,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.13807,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.13807,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.13807,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.13807,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.13807,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.13807,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.13807,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.13807,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.13807,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.13807,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.13807,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.13807,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.13807,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.13807,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.13807,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.13807,"percentile":0.96492}]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[{"id":"REF_5C5A3B8599FA0BA5","name":"Exploit Reference (squid-cache.org)","source":"reference","url":"http://www.squid-cache.org/Advisories/SQUID-2004_1.txt","maturity":"unknown","reliabilityScore":0.2,"verified":false,"type":null,"platforms":[],"requiresAuth":null,"exploitdb":null,"metasploit":null},{"id":"REF_BE7C56C0BFF32C05","name":"Exploit Reference (securityfocus.com)","source":"reference","url":"http://www.securityfocus.com/bid/9778","maturity":"unknown","reliabilityScore":0.2,"verified":false,"type":null,"platforms":[],"requiresAuth":null,"exploitdb":null,"metasploit":null},{"id":"23777","name":"Squid Proxy 2.4/2.5 - NULL URL Character Unauthorized Access","source":"exploit-database","url":"https://www.exploit-db.com/exploits/23777","maturity":"weaponized","reliabilityScore":0.8,"verified":true,"type":"remote","platforms":["linux"],"requiresAuth":null,"exploitdb":{"verified":true,"type":"remote","platform":"linux","file":"exploits/linux/remote/23777.txt","codes":["CVE-2004-0189","OSVDB-5916"]},"metasploit":null}],"exploitCount":3,"weaknesses":[],"affected":[{"vendor":"debian","product":"squid","name":"squid","label":"squid","ecosystem":"Debian","cpePart":null,"purl":"pkg:deb/debian/squid","purlType":"deb","versions":[{"text":"< 2.5.5-1","noFixRecorded":false,"fixedIn":null},{"text":"< 2.4.6-2woody2","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 2.5.5-1 | < 2.4.6-2woody2","eol":null,"hubHref":null},{"vendor":"redhat","product":"squid","name":"squid","label":"squid","ecosystem":"Red Hat","cpePart":null,"purl":"pkg:rpm/redhat/squid","purlType":"rpm","versions":[{"text":"< 7:2.5.STABLE3-5.3E","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 7:2.5.STABLE3-5.3E","eol":null,"hubHref":null},{"vendor":"redhat","product":"squid-debuginfo","name":"squid-debuginfo","label":"squid-debuginfo","ecosystem":"Red Hat","cpePart":null,"purl":"pkg:rpm/redhat/squid-debuginfo","purlType":"rpm","versions":[{"text":"< 7:2.5.STABLE3-5.3E","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 7:2.5.STABLE3-5.3E","eol":null,"hubHref":null},{"vendor":"squid","product":"squid","name":"squid","label":"squid","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"2.0_patch2","noFixRecorded":false,"fixedIn":null},{"text":"2.1_patch2","noFixRecorded":false,"fixedIn":null},{"text":"2.3_stable5","noFixRecorded":false,"fixedIn":null},{"text":"2.4","noFixRecorded":false,"fixedIn":null},{"text":"2.4_stable7","noFixRecorded":false,"fixedIn":null},{"text":"2.5_stable3","noFixRecorded":false,"fixedIn":null},{"text":"2.5_stable4","noFixRecorded":false,"fixedIn":null}],"versionsText":"2.0_patch2 | 2.1_patch2 | 2.3_stable5 | 2.4 | 2.4_stable7 | 2.5_stable3 | 2.5_stable4","eol":null,"hubHref":"/vendor/squid/squid"}],"affectedCount":4,"eol":{"hasEol":false,"count":0},"references":[{"url":"http://www.squid-cache.org/Advisories/SQUID-2004_1.txt","label":"www.squid-cache.org/Advisories/SQUID-2004_1.txt","hostname":"www.squid-cache.org","tags":["X Refsource CONFIRM","Exploit","Patch","Vendor Advisory","ARTICLE"]},{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/15366","label":"exchange.xforce.ibmcloud.com/vulnerabilities/15366","hostname":"exchange.xforce.ibmcloud.com","tags":["VDB Entry","X Refsource XF"]},{"url":"http://www.debian.org/security/2004/dsa-474","label":"www.debian.org/security/2004/dsa-474","hostname":"www.debian.org","tags":["Vendor Advisory","X Refsource DEBIAN"]},{"url":"https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A877","label":"oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A877","hostname":"oval.cisecurity.org","tags":["VDB Entry","Signature","X Refsource OVAL"]},{"url":"http://www.securityfocus.com/bid/9778","label":"www.securityfocus.com/bid/9778","hostname":"www.securityfocus.com","tags":["VDB Entry","X Refsource BID","Exploit","Patch","Vendor Advisory"]},{"url":"http://www.mandrakesoft.com/security/advisories?name=MDKSA-2004:025","label":"www.mandrakesoft.com/security/advisories?name=MDKSA-2004:025","hostname":"www.mandrakesoft.com","tags":["Vendor Advisory","X Refsource MANDRAKE"]},{"url":"https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A941","label":"oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A941","hostname":"oval.cisecurity.org","tags":["VDB Entry","Signature","X Refsource OVAL"]},{"url":"http://www.redhat.com/support/errata/RHSA-2004-133.html","label":"www.redhat.com/support/errata/RHSA-2004-133.html","hostname":"www.redhat.com","tags":["Vendor Advisory","X Refsource REDHAT"]},{"url":"http://www.redhat.com/support/errata/RHSA-2004-134.html","label":"www.redhat.com/support/errata/RHSA-2004-134.html","hostname":"www.redhat.com","tags":["Vendor Advisory","X Refsource REDHAT"]},{"url":"http://marc.info/?l=bugtraq&m=108084935904110&w=2","label":"marc.info?l=bugtraq&m=108084935904110&w=2","hostname":"marc.info","tags":["Mailing List","X Refsource BUGTRAQ"]},{"url":"http://security.gentoo.org/glsa/glsa-200403-11.xml","label":"security.gentoo.org/glsa/glsa-200403-11.xml","hostname":"security.gentoo.org","tags":["Vendor Advisory","X Refsource GENTOO"]},{"url":"http://distro.conectiva.com.br/atualizacoes/?id=a&anuncio=000838","label":"distro.conectiva.com.br/atualizacoes/?id=a&anuncio=000838","hostname":"distro.conectiva.com.br","tags":["Vendor Advisory","X Refsource CONECTIVA"]},{"url":"http://www.osvdb.org/5916","label":"www.osvdb.org/5916","hostname":"www.osvdb.org","tags":["VDB Entry","X Refsource OSVDB"]},{"url":"https://access.redhat.com/errata/RHSA-2004:133","label":"access.redhat.com/errata/RHSA-2004:133","hostname":"access.redhat.com","tags":["Advisory"]},{"url":"https://access.redhat.com/security/updates/classification/#low","label":"access.redhat.com/security/updates/classification/","hostname":"access.redhat.com","tags":["ARTICLE"]},{"url":"http://www.microsoft.com/security/incident/spoof.asp","label":"www.microsoft.com/security/incident/spoof.asp","hostname":"www.microsoft.com","tags":["ARTICLE"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=118032","label":"bugzilla.redhat.com/show_bug.cgi?id=118032","hostname":"bugzilla.redhat.com","tags":["REPORT"]},{"url":"https://security.access.redhat.com/data/csaf/v2/advisories/2004/rhsa-2004_133.json","label":"security.access.redhat.com/data/csaf/v2/advisories/2004/rhsa-2004_133.json","hostname":"security.access.redhat.com","tags":["Advisory"]},{"url":"https://access.redhat.com/security/cve/CVE-2004-0189","label":"access.redhat.com/security/cve/CVE-2004-0189","hostname":"access.redhat.com","tags":["REPORT"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1617177","label":"bugzilla.redhat.com/show_bug.cgi?id=1617177","hostname":"bugzilla.redhat.com","tags":["REPORT"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2004-0189","label":"www.cve.org/CVERecord?id=CVE-2004-0189","hostname":"www.cve.org","tags":["Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2004-0189","label":"nvd.nist.gov/vuln/detail/CVE-2004-0189","hostname":"nvd.nist.gov","tags":["Advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2004-0189","label":"security-tracker.debian.org/tracker/CVE-2004-0189","hostname":"security-tracker.debian.org","tags":["Advisory"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2004-09-01T04:00:00.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2024-08-08T00:10:03.868Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":43,"level":"medium","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-21T02:52:20.603Z","stale":false,"partial":false}}